In our previous works (see ECSOC-15, 2008 and also 2 our accompanied communication) we found interesting dependencies of ortho- and meta-protons chemical shift (δ_o^H) in monoalkylbenzenes and disubstituted para-alkylaromatic compounds NMR ¹H spectra upon the place and degree of branching of alkyl chain. If this branching takes place at the α-carbon atom, the shift of basic spectral parameter – δ_i^H (δ_o^H or δ_m^H) - is observed and entitled as "α-effect"; the branching at β-carbon atom leads to another type shift ("β-effect"). The positive value of α- or β-effect means that δ_i^H value increases with the increasing of amount of methyl groups in α- or β-position; contrary, negative value of such effect mean decrease δ_i^H value. The natural question emerges: are α- and β-effects for phenyl ring carbon atoms existed too? We obtain the answer while studying NMR ¹H spectra of 26 especially selected rows of disubstituted para-alkylaromatic compounds N_n of the general formula p-Y-C₆H₄-(CH₂)_r-CR¹R²R³ (where r=0 or r=1). We examined as substituents "Y" 26 the most widespread groups from most electronegative (NO₂) to most electropositive (NMe₂). The variable fragments (R¹, R², R³) given in general formula are only hydrogen atom or methyl group. Depending upon the place of alkyl chain branching all compounds we divide into two types: the compounds of A type (r=0 in general formula), where the branching takes place at α-carbon atom and compounds of B type branched at β-carbon atom (r=1). The differential spectral parameters (Δδ_i^C) were used instead of basic ones (δ_i^C). The Δδ_i^C parameter means a difference between the value of studied carbon chemical shift δ_i^C,N(n) of the examined compound N_n and the same value δ_i^C,N(0) of the standard compound, where all variable substituents R¹ = R² = R³ = Н. The δ_i^C,N(0) and Δδ_i^C parameter values of all A and B type compounds are demonstrated in 5 tables. Averaged values of differential parameters were calculated, tabulated in additional 4 tables and pictured on 4 diagrams. In our communication we have a broad discussion of values and signs calculated for all types averaged differential parameters. The regular "structure-property" dependencies (α- and β-effects) which were founded only for δ₀^H,N(n) parameters, are also detected for 4 types of δ_i^C,N(n) parameters of studied disubstituted para-alkylaromatic compounds. Such α- and β-effects were observed for all examined differential spectral parameters Δδ_i^C,N(n) in all investigated rows of disubstituted para-alkylaromatic compounds. It should be stressed that for the investigated rows of compounds 1-26 there are no facts contradicting with the predicting values and signs of both α- and β-effects. The similar regular "structure-property" dependencies are also examined for ¹H NMR spectra parameters of other aromatic compounds in our accompanied communication, which we also want to sent now to ECSOC-15.

At the XIV Conference ECSOC (2010), we made the first post, which opened a new section of our research - the study of influence on each other through the space of two molecule fragments, unconnected by chemical bonds, at the time of registration of NMR spectra. In this investigation it was found that the aryl ring has the greatest influence on the spectral parameters of the studied fragment of the molecule, which is separated from the aryl groups by one or more chemical bonds. In the present communication we conduct systematic investigation of the described phenomenon researching the methyl and ethyl esters of ω-aryl fatty acids by general formula: Ar-(CR¹R²)_m-X-(CR³R⁴)_n-COOAlk, where Alk = Me or Et, and X = N or O. We have studied such esters: i) of aromatic acids (m = n = 0, heteroatom X in them missing), i.e. unsubstituted and substituted benzoic (1), α-naphthoic (2); ii) of ω-arylcarbonic acid (m = 0, heteroatom X in them missing): arylacetic (3) (n = 1), β-arylpropionic (4) (n = 2) and γ-arylbutyric (5) (n = 3), as well as iii) acids, in which the alkyl moiety of the molecule acidic fragment contains heteroatom X (nitrogen or oxygen) (6). The presence or absence of the aryl fragment influence on the alkoxy group was judged on the value of the basic spectral parameters - the chemical shifts of methyl protons (δ_СН3^Н) as well as (δ_СН2^Н and δ_СН3^Н) in ethyl groups. There were developed and validated specific criteria for identifying such effect. One of them is based on the introduction of a new virtual parameter - the expected value of the chemical shift of alkoxy group protons. By the sum of the results, obtained using all the necessary criteria, we make judgments about the probability of the presence or absence of the studied effect. There were suggested the presence of studied effects in ethers 3-6, and its absence in the esters 1 and 2, with the exception of esters of substituted benzoic acids (1), in which the substituent in the ortho-position is aryl group. Based on the virtual differential ∆δ_СН2^Н and ∆δ_СН3^Н ​​ parameters values (which is equal to the difference between "experimentally obtained" and "expected" values ​​of the basic spectral parameters δ_СН2^Н or δ_СН2^Н), as well as other criteria, we make judgments about the magnitude of the studied effect in esters 3-6 as well as its dependence on the values ​​of m, n, and X. A comparison of aryl group "influence magnitude" aryl group on the protons of methyl and methylene fragments of ethoxyl group. We make the overall conclusion about high probability of the studied effect existence in esters 3-6 and, especially, in compounds 3 and 4.

The research on fluorescent carbostyrils of the general type I has been going on in our work group for several years. In the course of these investigations we found that carbostyrils of type II having a 4-p-toluenesulfonyl group in position 4 - formed as not isolated intermediates in many cases during our investigations of strongly fluorescent 4-cyano-carbostyrils - showed surprisingly strong fluorescence: they exhibit long-wave absorption and fluorescence properties, and high quantum yields. These findings prompted us to investigate the synthesis and luminescence properties of 4-p-toluenesulfonyl-carbostyrils of type II dependent on the nature of substituents in position 3. In this contribution new types of the acceptor group in position 4 such as toluenesulfonyl and toluenesulfonyloxy groups are investigated, which were in earlier investigations applied as intermediates for e.g. strong fluorescent cyano-carbostyrils. Observations during the reaction sequences revealed that they have already similar strong fluorescence properties as the desired target molecules.

In a wide search program toward new antimicrobial agents, a seri of heterocyclic chalcones have been synthesized by condensing benzaldehyde derivatives with heteroarylmethylcetone in potassium hydroxide methanol according to the Claisen-Schmidt condensation at room temperature. The synthetic chalcones have been determined by IR spectroscopy and ¹H-NMR spectroscopy. The antimicro-bacterial activity of the novel products was evaluated against bacteria such as Staphylococcus aureus, Pseudomonas aeruginosae, E. coli and fungi such as Candida albicans, dermatophytes. The result shows that pyridine moiety may show antibacterial effect stronger than that of thiophene or furan. Heterocyclic chalcones with hydroxyl group on B ring at position 2 or 3 are considered as lead compounds for generation of new potential antimicrobial drugs in future.

In this paper we have investigated photocatalytic activity of the N, S-codoped TiO₂ nanoparticles for degradation of 4-NP in aqueous. In this method nitrogen and sulfur doping by using a single source, ammonium sulfate as the modification agent of titanium tetrachloride as precursor and the N, S-codoped TiO₂ nanoparticles prepared by the sol-gel method. This catalyst was characterized by XRD, SEM, UV- visible and FT-IR.

Composite of magnetic and conductive Hollow polyaniline/CnFe₂O₄ nanosphere with novel core-shell structure were successfully prepared by in-situ polymerization in the presence of ammonium persulfate (APS) as the oxidant and dodecyl benzene sulfonic acid (DBSA) as the surfactant and dopant. The synthesized hollow microsphere composites were characterized by FT-IR and UV/Vis spectrophotometry. X-ray photoelectron spectroscopy was used to determine the degree of coating with a conducting polymer. Its morphology was characterized by scanning electron Microscopy (SEM). The changes of the magnetic properties before and after polyaniline coating were investigated by using vibrating sample magnetometer (VSM).

In this work, a novel method of microwave assisted chemical precipitation procedure was used to synthesize AgInS2 nanoparticles. Ag, In and S precursors with a stoichiometric ratio of 1:1:2 were dissolved in ethylene glycol as solvent and compolexing agent. The resultant precipitation was placed under microwave irradiation for 5 min to obtain product. X-ray diffraction pattern (XRD) and scanning electron microscopy (SEM) were employed to characterize the final product.